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[FLINK-18194][walkthroughs] Add transactions data generator
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@sjwiesman
sjwiesman committed Jun 10, 2020
1 parent 43ec2eb commit 724dfa0af8d7529f16f87dd360b8d80f1cc826a9
Showing 6 changed files with 442 additions and 0 deletions.
33 docker/data-generator/Dockerfile
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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

FROM maven:3.6-jdk-8-slim AS builder

# Get data producer code and compile it
COPY ./src /opt/data-producer/src
COPY ./pom.xml /opt/data-producer/pom.xml

RUN cd /opt/data-producer; \
mvn clean install

FROM openjdk:8-jre

COPY --from=builder /opt/data-producer/target/data-generator-*.jar /opt/data-generator.jar

RUN cd /opt

COPY docker-entrypoint.sh /

ENTRYPOINT ["/docker-entrypoint.sh"]
18 docker/data-generator/docker-entrypoint.sh
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#!/bin/bash

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

java -classpath /opt/data-generator.jar org.apache.flink.playground.datagen.DataGenerator
164 docker/data-generator/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
-->
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>org.apache.flink</groupId>
<artifactId>data-generator</artifactId>
<version>1.0.0</version>

<url>http://flink.apache.org</url>
<inceptionYear>2014</inceptionYear>

<licenses>
<license>
<name>The Apache Software License, Version 2.0</name>
<url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
<distribution>repo</distribution>
</license>
</licenses>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<kafka.version>2.2.0</kafka.version>
<avro.version>1.8.2</avro.version>
<java.version>1.8</java.version>
<java.version>1.8</java.version>
<spotless-maven-plugin.version>1.20.0</spotless-maven-plugin.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
</properties>

<dependencies>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>${kafka.version}</version>
</dependency>
</dependencies>

<build>
<plugins>
<!-- Java Compiler -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>

<!-- Shade plugin to include all dependencies -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<!-- Run shade goal on package phase -->
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<artifactSet>
<excludes>
</excludes>
</artifactSet>
<filters>
<filter>
<!-- Do not copy the signatures in the META-INF folder.
Otherwise, this might cause SecurityExceptions when using the JAR. -->
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.rat</groupId>
<artifactId>apache-rat-plugin</artifactId>
<version>0.13</version>
<inherited>false</inherited>
<executions>
<execution>
<phase>verify</phase>
<goals>
<goal>check</goal>
</goals>
</execution>
</executions>
<configuration>
<excludes>
<!-- Additional files like .gitignore etc.-->
<exclude>**/.*/**</exclude>
<exclude>**/*.prefs</exclude>
<exclude>**/*.log</exclude>
<!-- Administrative files in the main trunk. -->
<exclude>**/README.md</exclude>
<exclude>**/CODE_OF_CONDUCT.md</exclude>
<exclude>.github/**</exclude>
<!-- IDE files. -->
<exclude>**/*.iml</exclude>
<!-- Generated content -->
<exclude>**/target/**</exclude>
<exclude>**/dependency-reduced-pom.xml</exclude>
</excludes>
</configuration>
</plugin>

<!-- Java code style -->
<plugin>
<groupId>com.diffplug.spotless</groupId>
<artifactId>spotless-maven-plugin</artifactId>
<version>${spotless-maven-plugin.version}</version>
<configuration>
<java>
<googleJavaFormat>
<version>1.7</version>
<style>GOOGLE</style>
</googleJavaFormat>
<removeUnusedImports/>
</java>
</configuration>
<executions>
<execution>
<id>spotless-check</id>
<phase>verify</phase>
<goals>
<goal>check</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

</project>
45 docker/data-generator/src/main/java/org/apache/flink/playground/datagen/DataGenerator.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.apache.flink.playground.datagen;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class DataGenerator {

private static final Logger LOG = LoggerFactory.getLogger(DataGenerator.class);

private static final String KAFKA = "kafka:9092";

private static final String TOPIC = "transactions";

public static void main(String[] args) {
Producer producer = new Producer(KAFKA, TOPIC);

Runtime.getRuntime()
.addShutdownHook(
new Thread(
() -> {
LOG.info("Shutting down");
producer.close();
}));

producer.run();
}
}
111 docker/data-generator/src/main/java/org/apache/flink/playground/datagen/Producer.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.apache.flink.playground.datagen;

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.util.Iterator;
import java.util.Properties;
import java.util.Random;
import java.util.function.UnaryOperator;
import java.util.stream.Stream;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.common.serialization.LongSerializer;
import org.apache.kafka.common.serialization.StringSerializer;

public class Producer implements Runnable, AutoCloseable {

private static final DateTimeFormatter formatter =
DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm:ss");

private volatile boolean isRunning;

private final String brokers;

private final String topic;

public Producer(String brokers, String topic) {
this.brokers = brokers;
this.topic = topic;
this.isRunning = true;
}

@Override
public void run() {
KafkaProducer<Long, String> producer = new KafkaProducer<>(getProperties());

Throttler throttler = new Throttler(100);

Random generator = new Random();

Iterator<Long> accounts =
Stream.generate(() -> Stream.of(1L, 2L, 3L, 4L, 5L))
.flatMap(UnaryOperator.identity())
.iterator();

Iterator<LocalDateTime> timestamps =
Stream.iterate(
LocalDateTime.of(2000, 1, 1, 1, 0),
time -> time.plusMinutes(5).plusSeconds(generator.nextInt(58) + 1))
.iterator();

while (isRunning) {

Long account = accounts.next();
LocalDateTime timestamp = timestamps.next();
long millis = timestamp.atZone(ZoneOffset.UTC).toInstant().toEpochMilli();

String transaction =
String.format(
"%s, %s, %s",
account.toString(), generator.nextInt(1000), timestamp.format(formatter));

ProducerRecord<Long, String> record =
new ProducerRecord<>(topic, null, millis, account, transaction);
producer.send(record);

try {
throttler.throttle();
} catch (InterruptedException e) {
isRunning = false;
}
}

producer.close();
}

@Override
public void close() {
isRunning = false;
}

private Properties getProperties() {
final Properties props = new Properties();
props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, brokers);
props.put(ProducerConfig.ACKS_CONFIG, "all");
props.put(ProducerConfig.RETRIES_CONFIG, 0);
props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, LongSerializer.class);
props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);

return props;
}
}

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